Post on 31-Jan-2016
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Lab #7 – Thevenin/Norton
• Activity #1 – finding the Thevenin/Norton Equivalent for the function generator– The function generator is a voltage source that
produces an AC voltage, usually a sinusoidal voltage.
– The waveform produced repeats itself over and over again, in this case 400 times per second
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BK Function Generator
Adjust the frequency knobs to the desired frequency.
Select the range
Turn on
Choose Sine
Output terminal
Adjust outputVoltage
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Lab #7 – Thevenin/Norton
• Activity #1 – finding the Thevenin/Norton Equivalent for the function generator– The multimeter is used to measure the RMS
(root mean square) voltage (or effective DC voltage because it supplies as much power as a DC voltage source would.)
– The DMM can also measure the frequency of the source.
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Digital Multimeter (DMM)
Power switch
AC voltage AC current
Press the AC voltage button to get the RMS value of AC part of waveform.
Range is set automatically
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Digital Multimeter (DMM)
2ND FREQ
You can display the Frequency at the same time by pressing the 2ND button and then pressing the FREQ button.
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Activity #2 – Max Power
• Now that you have Rth = RN you can measure the output voltage for different loads and calculate the power delivered to each load.
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Activities #3-5 – Simulations
• Find Vth– Find open circuit voltage for
• Circuit with only independent sources
• Circuit with both independent and dependent sources
– Vth=0 for circuits with only dependent sources
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Activities #3-5 – Simulations
• Find Rth– For circuits with only independent sources
• By source removal, short circuit current or by applying a load
– For circuits with only dependent sources• Connect a test source to the output
– For circuits with both types of sources• By short circuit current, by applying a load or by
connecting a test source to the output